from my_utils import *
str_util_01 = str_util.str_reverse("good")
print(str_util_01)
str_util_02 = str_util.substr("你是一个好人", 4, 6)
print(str_util_02)

file_name = "D:\\good.txt"
file_util.print_file_info(file_name)
file_util.append_to_file(file_name, "在调用file_util时，进行追加\n")


